Я уже не помню что там было

package-lock.json

@@ -8,7 +8,6 @@
       "name": "store-client",
       "version": "0.0.0",
       "dependencies": {
-        "@tanstack/react-query": "^5.100.14",
         "react": "^19.1.0",
         "react-dom": "^19.1.0"
       },
@@ -1305,32 +1304,6 @@
         "win32"
       ]
     },
-    "node_modules/@tanstack/query-core": {
-      "version": "5.100.14",
-      "resolved": "https://registry.npmjs.org/@tanstack/query-core/-/query-core-5.100.14.tgz",
-      "integrity": "sha512-5X41dGpxgeaHISCRW2oYwcSycZeULZzAunaudXT9ov1KOTj9xwt0CH6hbwqP1/z74ZWF7rYFnDpyYH07XFcZew==",
-      "license": "MIT",
-      "funding": {
-        "type": "github",
-        "url": "https://github.com/sponsors/tannerlinsley"
-      }
-    },
-    "node_modules/@tanstack/react-query": {
-      "version": "5.100.14",
-      "resolved": "https://registry.npmjs.org/@tanstack/react-query/-/react-query-5.100.14.tgz",
-      "integrity": "sha512-oOr6aRdSFEwWhzxEkD/9ZcItM3+LjBSkeVmadWKwUssAHTsqd/7bOjWrX4AbvEkoEhgAxzN0Xk6H/aYzXiYBAw==",
-      "license": "MIT",
-      "dependencies": {
-        "@tanstack/query-core": "5.100.14"
-      },
-      "funding": {
-        "type": "github",
-        "url": "https://github.com/sponsors/tannerlinsley"
-      },
-      "peerDependencies": {
-        "react": "^18 || ^19"
-      }
-    },
     "node_modules/@types/babel__core": {
       "version": "7.20.5",
       "resolved": "https://registry.npmjs.org/@types/babel__core/-/babel__core-7.20.5.tgz",

package.json

@@ -4,13 +4,12 @@
   "version": "0.0.0",
   "type": "module",
   "scripts": {
-    "dev": "vite",
+    "dev": "vite", 
     "build": "vite build",
     "lint": "eslint .",
     "preview": "vite preview"
   },
   "dependencies": {
-    "@tanstack/react-query": "^5.100.14",
     "react": "^19.1.0",
     "react-dom": "^19.1.0"
   },

src/App.jsx

@@ -1,93 +1,78 @@
-import React, {useState, useEffect, useRef } from 'react'
-//import { useQuery } from '@tanstack/react-query'
+import { useState, createContext, useContext } from 'react'
+import styles from './App.module.scss'
 
-function useWindowWidth() {
-    const [width,setWidth] = useState(window.innerWidth)
-    
-    useEffect(() => {
-        const handleResize = () => setWidth(window.innerWidth);
-        window.addEventListener('resize',handleResize);
-        return () => window.removeEventListener('resize',handleResize);
-    },[])
-    
-    return width
-}
+const UserContext = createContext('')
 
-function useLocalStorage(key, initValue) {
-    const [value, setValue] = useState(()=>{
-        const stored = localStorage.getItem(key);
-        return stored !== null ? JSON.parse(stored) : initValue
-    })
+function UserProvider({ children }) {
+    const [name,setName] = useState('');
     
-    useEffect(() => {
-        localStorage.setItem(key, JSON.stringify(value))
-    },[key, value])
-    
-    return [value,setValue]
-}
-/*
-function useUserData(userId) {
-    return useQuery(
-        ['user',userId],
-        () => fetch(`/api/user/${userId}`).then(res => res.json()),
-        {refetchOnWindowFocus: false}
-    )
-}*/
-
-function useInput(initValue, validate) {
-    const [value, setValue] = useState(initValue);
-    const [error, setError] = useState(null);
-    
-    const onChange = e => {
-        const newValue = e.target.value
-        setValue(newValue)
-        if (validate) {
-            const validationResult = validate(newValue)
-            setError(validationResult)
-        }
+    const toggleName = (newName) => {
+        setName(newName);
     }
     
-    return { value, error, onChange }
-}
-
-function useInterval(callback, delay) {
-    const savedCallback = useRef()
-    
-    useEffect(()=>{
-        savedCallback.current = callback
-    },[callback]);
-    
-    useEffect(()=>{
-        if (delay == null) return
-        const id = setInterval(()=>{
-            savedCallback.current()
-        },delay);
-        return () => clearInterval(id);
-    },[delay])
-}
-
-function App() {
-    const width = useWindowWidth();
-    const [theme, setTheme] = useLocalStorage('theme','light');
-    
-    const username = useInput(
-        '',
-        value => value.length < 3 ? 'минимум 3 символа' : null
+    return (
+        <UserContext.Provider value={{name, toggleName}}>
+            {children}
+        </UserContext.Provider>
     )
+}
+
+function Form() {
+    const {name, toggleName} = useContext(UserContext)
+    const [newName,setNewName] = useState('');
+    const handleSubmit = (event) => {
+        event.preventDefault();
+        toggleName(event.target[0].value)
+    }
+    const handlerChange = (event) => {
+        setNewName(event.target.value);
+    }
+    return (
+        <form onSubmit={handleSubmit}>
+        <input type='text' value={newName} onChange={handlerChange} />
+        <button type='submit'>Войти</button>
+        </form>
+    )
+}
+
+function ExitButton() {
+    const {name, toggleName} = useContext(UserContext)
+    
+    return (
+        <button onClick={() => toggleName('')}>Выход</button>
+    )
+}
+
+function Toolbar() {
+    const {name, toggleName} = useContext(UserContext)
+    return(
+        <div className={styles.container}>
+            <h3>Панель пользователя</h3>
+            {name && `Привет ${name}`}
+            {name ? <ExitButton /> : <Form /> }
+            
+        </div>
+    )
+}
+
+function Page() {
+    return (
+        <div>
+            <h1 style={{textAlign: 'center'}}>Главная страница</h1>
+            <Toolbar />
+        </div>
+    )
+}
+
+function App() {    
     
 	return (
 		<>
-			<h1>Hello, React!{width}</h1>
-            <button onClick={()=>{
-                setTheme(theme === 'light' ? 'dark' : 'light')
-            }}>
-                Сменить тему
-            </button>
-            <p><input type="text" 
-                value={username.value} 
-                onChange={username.onChange} />
-                { username.error ? username.error : '' }
-            </p>
+			{/* Добавьте тестовый контент для проверки */}
+			<h1>Hello, React!</h1>
+        <UserProvider>
+            <Page />
+        </UserProvider>
 		</>
 	)
 }

src/App.module.scss

@@ -0,0 +1,13 @@
+.container {
+    height: 500px;
+    border: 1px solid black;
+    border-radius: 10px;
+    background-color: lightblue;
+}
+.item {
+    font-size: 16pt;
+    border: 1px dotted gray;
+    /*margin: 5px 10px;
+    padding: 10px;*/
+    border-radius: 5px;
+}